./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix026_power.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix026_power.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix026_power.opt_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix026_power.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:05:49,034 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:05:49,138 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:05:49,143 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:05:49,143 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:05:49,168 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:05:49,169 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:05:49,169 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:05:49,169 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:05:49,174 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:05:49,174 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:05:49,174 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:05:49,175 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:05:49,177 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:05:49,177 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:05:49,177 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:05:49,177 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:05:49,177 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:05:49,178 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:05:49,178 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:05:49,179 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:05:49,179 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:05:49,180 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:05:49,180 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:05:49,180 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:05:49,180 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:05:49,180 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:05:49,181 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:05:49,181 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:05:49,181 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:05:49,182 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:05:49,182 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:05:49,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:05:49,183 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:05:49,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:05:49,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:05:49,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:05:49,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:05:49,183 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:05:49,184 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:05:49,184 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:05:49,184 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:05:49,184 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:05:49,184 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:05:49,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:05:49,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:05:49,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:05:49,368 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:05:49,369 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:05:49,370 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix026_power.opt_tso.opt.i [2024-06-20 16:05:50,441 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:05:50,627 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:05:50,628 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix026_power.opt_tso.opt.i [2024-06-20 16:05:50,639 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11dbd7ced/fcb39ffbe3c4420091b152802e8d316c/FLAGa26885d50 [2024-06-20 16:05:50,649 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11dbd7ced/fcb39ffbe3c4420091b152802e8d316c [2024-06-20 16:05:50,651 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:05:50,652 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:05:50,653 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix026_power.opt_tso.opt.yml/witness.yml [2024-06-20 16:05:50,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:05:50,797 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:05:50,798 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:05:50,798 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:05:50,802 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:05:50,802 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:05:50" (1/2) ... [2024-06-20 16:05:50,803 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2de3c943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:05:50, skipping insertion in model container [2024-06-20 16:05:50,803 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:05:50" (1/2) ... [2024-06-20 16:05:50,804 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7657fe26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:05:50, skipping insertion in model container [2024-06-20 16:05:50,804 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:05:50" (2/2) ... [2024-06-20 16:05:50,805 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2de3c943 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:50, skipping insertion in model container [2024-06-20 16:05:50,805 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:05:50" (2/2) ... [2024-06-20 16:05:50,805 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:05:50,947 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:05:50,948 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 16:05:50,949 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] ((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 16:05:50,949 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] ((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 16:05:50,949 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 16:05:50,949 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:05:50,950 INFO L106 edCorrectnessWitness]: ghost_update [L863-L863] multithreaded = 1; [2024-06-20 16:05:50,988 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:05:51,346 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:05:51,370 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:05:51,513 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:05:51,557 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:05:51,557 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51 WrapperNode [2024-06-20 16:05:51,557 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:05:51,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:05:51,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:05:51,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:05:51,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51" (1/1) ... [2024-06-20 16:05:51,576 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51" (1/1) ... [2024-06-20 16:05:51,602 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-20 16:05:51,603 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:05:51,604 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:05:51,604 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:05:51,604 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:05:51,612 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51" (1/1) ... [2024-06-20 16:05:51,613 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51" (1/1) ... [2024-06-20 16:05:51,615 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51" (1/1) ... [2024-06-20 16:05:51,629 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:05:51,629 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51" (1/1) ... [2024-06-20 16:05:51,629 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51" (1/1) ... [2024-06-20 16:05:51,637 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51" (1/1) ... [2024-06-20 16:05:51,639 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51" (1/1) ... [2024-06-20 16:05:51,641 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51" (1/1) ... [2024-06-20 16:05:51,642 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51" (1/1) ... [2024-06-20 16:05:51,645 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:05:51,645 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:05:51,646 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:05:51,646 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:05:51,646 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51" (1/1) ... [2024-06-20 16:05:51,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:05:51,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:05:51,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:05:51,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:05:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:05:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:05:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:05:51,810 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:05:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:05:51,811 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:05:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:05:51,811 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:05:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:05:51,811 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:05:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:05:51,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:05:51,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:05:51,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:05:51,813 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:05:51,941 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:05:51,942 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:05:52,360 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:05:52,360 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:05:52,523 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:05:52,523 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:05:52,524 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:05:52 BoogieIcfgContainer [2024-06-20 16:05:52,524 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:05:52,527 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:05:52,527 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:05:52,529 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:05:52,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:05:50" (1/4) ... [2024-06-20 16:05:52,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c0e022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:05:52, skipping insertion in model container [2024-06-20 16:05:52,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:05:50" (2/4) ... [2024-06-20 16:05:52,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c0e022 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:05:52, skipping insertion in model container [2024-06-20 16:05:52,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:05:51" (3/4) ... [2024-06-20 16:05:52,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c0e022 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:05:52, skipping insertion in model container [2024-06-20 16:05:52,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:05:52" (4/4) ... [2024-06-20 16:05:52,532 INFO L112 eAbstractionObserver]: Analyzing ICFG mix026_power.opt_tso.opt.i [2024-06-20 16:05:52,544 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:05:52,544 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:05:52,544 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:05:52,595 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:05:52,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 16:05:52,657 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-20 16:05:52,657 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:05:52,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:05:52,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 16:05:52,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-20 16:05:52,672 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:05:52,677 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@23e426c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:05:52,677 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:05:52,680 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:05:52,680 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:05:52,680 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:05:52,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:52,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:05:52,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:05:52,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:52,685 INFO L85 PathProgramCache]: Analyzing trace with hash 393972039, now seen corresponding path program 1 times [2024-06-20 16:05:52,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:52,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127049036] [2024-06-20 16:05:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:52,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:53,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:53,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127049036] [2024-06-20 16:05:53,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127049036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:53,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:53,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:05:53,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190367426] [2024-06-20 16:05:53,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:53,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:05:53,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:53,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:05:53,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:05:53,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-20 16:05:53,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:53,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:53,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-20 16:05:53,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:54,978 INFO L124 PetriNetUnfolderBase]: 8152/11667 cut-off events. [2024-06-20 16:05:54,978 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-06-20 16:05:54,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23154 conditions, 11667 events. 8152/11667 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 65865 event pairs, 6174 based on Foata normal form. 1/11304 useless extension candidates. Maximal degree in co-relation 23141. Up to 11108 conditions per place. [2024-06-20 16:05:55,034 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 42 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-20 16:05:55,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 227 flow [2024-06-20 16:05:55,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:05:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:05:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-06-20 16:05:55,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-20 16:05:55,045 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 99 transitions. [2024-06-20 16:05:55,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 227 flow [2024-06-20 16:05:55,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:05:55,052 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-20 16:05:55,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-20 16:05:55,056 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-20 16:05:55,057 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-20 16:05:55,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:55,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:55,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:55,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:05:55,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:05:55,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:55,059 INFO L85 PathProgramCache]: Analyzing trace with hash 650993028, now seen corresponding path program 1 times [2024-06-20 16:05:55,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:55,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815951270] [2024-06-20 16:05:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:55,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:55,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:55,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815951270] [2024-06-20 16:05:55,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815951270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:55,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:55,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:05:55,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40919742] [2024-06-20 16:05:55,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:55,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:05:55,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:55,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:05:55,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:05:55,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-20 16:05:55,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:55,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:55,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-20 16:05:55,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:57,181 INFO L124 PetriNetUnfolderBase]: 9527/13244 cut-off events. [2024-06-20 16:05:57,182 INFO L125 PetriNetUnfolderBase]: For 2494/2494 co-relation queries the response was YES. [2024-06-20 16:05:57,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29983 conditions, 13244 events. 9527/13244 cut-off events. For 2494/2494 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72021 event pairs, 5670 based on Foata normal form. 8/13249 useless extension candidates. Maximal degree in co-relation 29971. Up to 12883 conditions per place. [2024-06-20 16:05:57,235 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 54 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-20 16:05:57,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 325 flow [2024-06-20 16:05:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:05:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:05:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-20 16:05:57,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6105769230769231 [2024-06-20 16:05:57,237 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 127 transitions. [2024-06-20 16:05:57,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 325 flow [2024-06-20 16:05:57,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:05:57,239 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-20 16:05:57,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-20 16:05:57,240 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-20 16:05:57,240 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-20 16:05:57,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:57,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:57,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:57,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:05:57,241 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:05:57,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:57,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1957078821, now seen corresponding path program 1 times [2024-06-20 16:05:57,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:57,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214836919] [2024-06-20 16:05:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:57,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:58,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:58,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214836919] [2024-06-20 16:05:58,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214836919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:58,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:58,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:05:58,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420295997] [2024-06-20 16:05:58,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:58,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:05:58,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:58,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:05:58,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:05:58,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-20 16:05:58,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:58,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:58,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-20 16:05:58,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:00,243 INFO L124 PetriNetUnfolderBase]: 9511/13194 cut-off events. [2024-06-20 16:06:00,244 INFO L125 PetriNetUnfolderBase]: For 7072/7072 co-relation queries the response was YES. [2024-06-20 16:06:00,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33307 conditions, 13194 events. 9511/13194 cut-off events. For 7072/7072 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 71614 event pairs, 4705 based on Foata normal form. 8/13199 useless extension candidates. Maximal degree in co-relation 33293. Up to 12817 conditions per place. [2024-06-20 16:06:00,319 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 70 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-20 16:06:00,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 484 flow [2024-06-20 16:06:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:06:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:06:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-20 16:06:00,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-20 16:06:00,324 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 180 transitions. [2024-06-20 16:06:00,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 484 flow [2024-06-20 16:06:00,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 456 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 16:06:00,328 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-20 16:06:00,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-20 16:06:00,329 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-20 16:06:00,329 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-20 16:06:00,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:00,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:00,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:00,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:06:00,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:00,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:00,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1193988501, now seen corresponding path program 1 times [2024-06-20 16:06:00,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:00,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30271459] [2024-06-20 16:06:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:00,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:01,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:01,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30271459] [2024-06-20 16:06:01,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30271459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:01,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:01,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:06:01,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663865089] [2024-06-20 16:06:01,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:01,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:06:01,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:01,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:06:01,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:06:01,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:06:01,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:01,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:01,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:06:01,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:02,556 INFO L124 PetriNetUnfolderBase]: 8107/11579 cut-off events. [2024-06-20 16:06:02,557 INFO L125 PetriNetUnfolderBase]: For 11520/11520 co-relation queries the response was YES. [2024-06-20 16:06:02,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31984 conditions, 11579 events. 8107/11579 cut-off events. For 11520/11520 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 65093 event pairs, 4373 based on Foata normal form. 3/11412 useless extension candidates. Maximal degree in co-relation 31967. Up to 11029 conditions per place. [2024-06-20 16:06:02,621 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 59 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-20 16:06:02,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 445 flow [2024-06-20 16:06:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:06:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:06:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 16:06:02,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038461538461538 [2024-06-20 16:06:02,623 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 131 transitions. [2024-06-20 16:06:02,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 445 flow [2024-06-20 16:06:02,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 407 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 16:06:02,628 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 264 flow [2024-06-20 16:06:02,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-20 16:06:02,629 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2024-06-20 16:06:02,629 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 264 flow [2024-06-20 16:06:02,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:02,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:02,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:02,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:06:02,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:02,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:02,630 INFO L85 PathProgramCache]: Analyzing trace with hash -2107554694, now seen corresponding path program 1 times [2024-06-20 16:06:02,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:02,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848598553] [2024-06-20 16:06:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:02,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:03,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:03,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848598553] [2024-06-20 16:06:03,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848598553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:03,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:03,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:06:03,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558433451] [2024-06-20 16:06:03,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:03,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:06:03,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:03,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:06:03,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:06:03,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:06:03,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 264 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:03,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:03,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:06:03,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:05,010 INFO L124 PetriNetUnfolderBase]: 9546/13252 cut-off events. [2024-06-20 16:06:05,010 INFO L125 PetriNetUnfolderBase]: For 21313/21313 co-relation queries the response was YES. [2024-06-20 16:06:05,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40125 conditions, 13252 events. 9546/13252 cut-off events. For 21313/21313 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 71967 event pairs, 5132 based on Foata normal form. 6/13255 useless extension candidates. Maximal degree in co-relation 40106. Up to 12898 conditions per place. [2024-06-20 16:06:05,097 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 71 selfloop transitions, 14 changer transitions 0/92 dead transitions. [2024-06-20 16:06:05,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 536 flow [2024-06-20 16:06:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:06:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:06:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 16:06:05,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967948717948718 [2024-06-20 16:06:05,099 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 264 flow. Second operand 6 states and 155 transitions. [2024-06-20 16:06:05,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 536 flow [2024-06-20 16:06:05,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 507 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:06:05,104 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 310 flow [2024-06-20 16:06:05,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-20 16:06:05,105 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2024-06-20 16:06:05,105 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 310 flow [2024-06-20 16:06:05,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:05,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:05,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:05,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:06:05,106 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:05,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:05,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2107404964, now seen corresponding path program 2 times [2024-06-20 16:06:05,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:05,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468990807] [2024-06-20 16:06:05,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:05,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:06,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:06,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468990807] [2024-06-20 16:06:06,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468990807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:06,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:06,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:06:06,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630908579] [2024-06-20 16:06:06,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:06,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:06:06,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:06,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:06:06,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:06:06,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:06:06,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:06,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:06,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:06:06,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:07,443 INFO L124 PetriNetUnfolderBase]: 9559/13287 cut-off events. [2024-06-20 16:06:07,444 INFO L125 PetriNetUnfolderBase]: For 30868/30877 co-relation queries the response was YES. [2024-06-20 16:06:07,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43604 conditions, 13287 events. 9559/13287 cut-off events. For 30868/30877 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 72143 event pairs, 5092 based on Foata normal form. 12/13293 useless extension candidates. Maximal degree in co-relation 43584. Up to 12871 conditions per place. [2024-06-20 16:06:07,519 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 66 selfloop transitions, 21 changer transitions 0/94 dead transitions. [2024-06-20 16:06:07,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 590 flow [2024-06-20 16:06:07,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:06:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:06:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 16:06:07,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967948717948718 [2024-06-20 16:06:07,520 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 310 flow. Second operand 6 states and 155 transitions. [2024-06-20 16:06:07,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 590 flow [2024-06-20 16:06:07,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 547 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:07,527 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 364 flow [2024-06-20 16:06:07,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=364, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-20 16:06:07,529 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-20 16:06:07,529 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 364 flow [2024-06-20 16:06:07,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:07,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:07,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:07,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:06:07,530 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:07,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:07,530 INFO L85 PathProgramCache]: Analyzing trace with hash -943703266, now seen corresponding path program 1 times [2024-06-20 16:06:07,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:07,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851157910] [2024-06-20 16:06:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:07,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:08,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:08,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851157910] [2024-06-20 16:06:08,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851157910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:08,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:08,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:08,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300172532] [2024-06-20 16:06:08,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:08,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:08,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:08,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:08,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:08,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:06:08,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 364 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:08,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:08,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:06:08,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:10,118 INFO L124 PetriNetUnfolderBase]: 9950/14172 cut-off events. [2024-06-20 16:06:10,119 INFO L125 PetriNetUnfolderBase]: For 42281/42281 co-relation queries the response was YES. [2024-06-20 16:06:10,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48932 conditions, 14172 events. 9950/14172 cut-off events. For 42281/42281 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 80267 event pairs, 5132 based on Foata normal form. 3/13962 useless extension candidates. Maximal degree in co-relation 48911. Up to 13468 conditions per place. [2024-06-20 16:06:10,249 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 82 selfloop transitions, 18 changer transitions 0/107 dead transitions. [2024-06-20 16:06:10,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 701 flow [2024-06-20 16:06:10,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:06:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:06:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 16:06:10,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 16:06:10,269 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 364 flow. Second operand 7 states and 175 transitions. [2024-06-20 16:06:10,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 701 flow [2024-06-20 16:06:10,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 107 transitions, 631 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:10,281 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 413 flow [2024-06-20 16:06:10,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=413, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-06-20 16:06:10,281 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-20 16:06:10,281 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 413 flow [2024-06-20 16:06:10,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:10,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:10,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:10,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:06:10,282 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:10,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:10,282 INFO L85 PathProgramCache]: Analyzing trace with hash 632473210, now seen corresponding path program 1 times [2024-06-20 16:06:10,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:10,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745847375] [2024-06-20 16:06:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:10,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:11,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:11,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745847375] [2024-06-20 16:06:11,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745847375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:11,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:11,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:11,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201061054] [2024-06-20 16:06:11,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:11,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:11,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:11,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:11,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:11,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:06:11,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 413 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:11,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:11,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:06:11,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:13,090 INFO L124 PetriNetUnfolderBase]: 11374/15804 cut-off events. [2024-06-20 16:06:13,090 INFO L125 PetriNetUnfolderBase]: For 65467/65467 co-relation queries the response was YES. [2024-06-20 16:06:13,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59945 conditions, 15804 events. 11374/15804 cut-off events. For 65467/65467 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 87487 event pairs, 5636 based on Foata normal form. 3/15804 useless extension candidates. Maximal degree in co-relation 59922. Up to 15345 conditions per place. [2024-06-20 16:06:13,187 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 91 selfloop transitions, 18 changer transitions 0/117 dead transitions. [2024-06-20 16:06:13,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 117 transitions, 775 flow [2024-06-20 16:06:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:06:13,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:06:13,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 16:06:13,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-20 16:06:13,188 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 413 flow. Second operand 7 states and 181 transitions. [2024-06-20 16:06:13,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 117 transitions, 775 flow [2024-06-20 16:06:13,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 117 transitions, 718 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:13,200 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 459 flow [2024-06-20 16:06:13,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-20 16:06:13,201 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-06-20 16:06:13,201 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 459 flow [2024-06-20 16:06:13,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:13,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:13,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:13,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:06:13,202 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:13,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:13,202 INFO L85 PathProgramCache]: Analyzing trace with hash 809970964, now seen corresponding path program 1 times [2024-06-20 16:06:13,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:13,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625230052] [2024-06-20 16:06:13,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:13,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:14,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:14,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625230052] [2024-06-20 16:06:14,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625230052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:14,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:14,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:06:14,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34243247] [2024-06-20 16:06:14,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:14,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:06:14,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:14,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:06:14,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:06:14,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:06:14,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 459 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:14,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:14,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:06:14,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:16,047 INFO L124 PetriNetUnfolderBase]: 9917/13871 cut-off events. [2024-06-20 16:06:16,047 INFO L125 PetriNetUnfolderBase]: For 71170/71170 co-relation queries the response was YES. [2024-06-20 16:06:16,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55361 conditions, 13871 events. 9917/13871 cut-off events. For 71170/71170 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 76517 event pairs, 4849 based on Foata normal form. 6/13728 useless extension candidates. Maximal degree in co-relation 55337. Up to 13393 conditions per place. [2024-06-20 16:06:16,137 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 94 selfloop transitions, 21 changer transitions 0/122 dead transitions. [2024-06-20 16:06:16,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 122 transitions, 833 flow [2024-06-20 16:06:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:06:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:06:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 16:06:16,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-20 16:06:16,138 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 459 flow. Second operand 8 states and 199 transitions. [2024-06-20 16:06:16,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 122 transitions, 833 flow [2024-06-20 16:06:16,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 122 transitions, 762 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 16:06:16,157 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 490 flow [2024-06-20 16:06:16,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=490, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-20 16:06:16,158 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 23 predicate places. [2024-06-20 16:06:16,159 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 490 flow [2024-06-20 16:06:16,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:16,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:16,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:16,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:06:16,159 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:16,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:16,160 INFO L85 PathProgramCache]: Analyzing trace with hash 289188826, now seen corresponding path program 1 times [2024-06-20 16:06:16,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:16,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487518333] [2024-06-20 16:06:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:16,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:16,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:16,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487518333] [2024-06-20 16:06:16,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487518333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:16,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:16,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:06:16,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825515300] [2024-06-20 16:06:16,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:16,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:06:16,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:16,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:06:16,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:06:16,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:06:16,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 490 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:16,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:16,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:06:16,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:18,414 INFO L124 PetriNetUnfolderBase]: 9910/14238 cut-off events. [2024-06-20 16:06:18,415 INFO L125 PetriNetUnfolderBase]: For 83328/83328 co-relation queries the response was YES. [2024-06-20 16:06:18,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58236 conditions, 14238 events. 9910/14238 cut-off events. For 83328/83328 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 81438 event pairs, 4949 based on Foata normal form. 2/14057 useless extension candidates. Maximal degree in co-relation 58211. Up to 13450 conditions per place. [2024-06-20 16:06:18,503 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 84 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2024-06-20 16:06:18,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 754 flow [2024-06-20 16:06:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:06:18,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:06:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-20 16:06:18,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47307692307692306 [2024-06-20 16:06:18,504 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 490 flow. Second operand 5 states and 123 transitions. [2024-06-20 16:06:18,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 754 flow [2024-06-20 16:06:18,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 678 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 16:06:18,527 INFO L231 Difference]: Finished difference. Result has 77 places, 87 transitions, 491 flow [2024-06-20 16:06:18,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=491, PETRI_PLACES=77, PETRI_TRANSITIONS=87} [2024-06-20 16:06:18,528 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-20 16:06:18,528 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 87 transitions, 491 flow [2024-06-20 16:06:18,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:18,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:18,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:18,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:06:18,529 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:18,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:18,529 INFO L85 PathProgramCache]: Analyzing trace with hash -904501045, now seen corresponding path program 1 times [2024-06-20 16:06:18,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:18,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427388854] [2024-06-20 16:06:18,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:18,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:19,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:19,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427388854] [2024-06-20 16:06:19,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427388854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:19,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:19,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:06:19,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765518449] [2024-06-20 16:06:19,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:19,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:06:19,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:19,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:06:19,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:06:19,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:06:19,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 87 transitions, 491 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:19,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:19,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:06:19,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:21,375 INFO L124 PetriNetUnfolderBase]: 11624/16130 cut-off events. [2024-06-20 16:06:21,375 INFO L125 PetriNetUnfolderBase]: For 116587/116587 co-relation queries the response was YES. [2024-06-20 16:06:21,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70210 conditions, 16130 events. 11624/16130 cut-off events. For 116587/116587 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 87465 event pairs, 5625 based on Foata normal form. 3/16130 useless extension candidates. Maximal degree in co-relation 70184. Up to 15655 conditions per place. [2024-06-20 16:06:21,487 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 112 selfloop transitions, 22 changer transitions 0/140 dead transitions. [2024-06-20 16:06:21,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 140 transitions, 947 flow [2024-06-20 16:06:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:06:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:06:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 16:06:21,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-20 16:06:21,490 INFO L175 Difference]: Start difference. First operand has 77 places, 87 transitions, 491 flow. Second operand 8 states and 195 transitions. [2024-06-20 16:06:21,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 140 transitions, 947 flow [2024-06-20 16:06:21,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 900 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 16:06:21,518 INFO L231 Difference]: Finished difference. Result has 84 places, 99 transitions, 607 flow [2024-06-20 16:06:21,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=607, PETRI_PLACES=84, PETRI_TRANSITIONS=99} [2024-06-20 16:06:21,518 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-20 16:06:21,518 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 99 transitions, 607 flow [2024-06-20 16:06:21,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:21,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:21,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:21,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:06:21,520 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:21,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash -660979553, now seen corresponding path program 2 times [2024-06-20 16:06:21,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:21,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323366697] [2024-06-20 16:06:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:21,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:22,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:22,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323366697] [2024-06-20 16:06:22,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323366697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:22,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:22,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:06:22,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056741402] [2024-06-20 16:06:22,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:22,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:06:22,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:22,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:06:22,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:06:22,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:06:22,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 607 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:22,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:22,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:06:22,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:24,430 INFO L124 PetriNetUnfolderBase]: 11668/16193 cut-off events. [2024-06-20 16:06:24,430 INFO L125 PetriNetUnfolderBase]: For 139341/139350 co-relation queries the response was YES. [2024-06-20 16:06:24,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75050 conditions, 16193 events. 11668/16193 cut-off events. For 139341/139350 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 87834 event pairs, 5635 based on Foata normal form. 9/16196 useless extension candidates. Maximal degree in co-relation 75021. Up to 15640 conditions per place. [2024-06-20 16:06:24,548 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 107 selfloop transitions, 40 changer transitions 0/153 dead transitions. [2024-06-20 16:06:24,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 153 transitions, 1113 flow [2024-06-20 16:06:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:06:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:06:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 16:06:24,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-20 16:06:24,550 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 607 flow. Second operand 8 states and 195 transitions. [2024-06-20 16:06:24,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 153 transitions, 1113 flow [2024-06-20 16:06:24,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 153 transitions, 1038 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:24,593 INFO L231 Difference]: Finished difference. Result has 89 places, 115 transitions, 766 flow [2024-06-20 16:06:24,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=766, PETRI_PLACES=89, PETRI_TRANSITIONS=115} [2024-06-20 16:06:24,594 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-06-20 16:06:24,594 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 115 transitions, 766 flow [2024-06-20 16:06:24,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:24,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:24,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:24,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:06:24,595 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:24,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash -660712643, now seen corresponding path program 3 times [2024-06-20 16:06:24,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:24,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093687737] [2024-06-20 16:06:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:24,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:25,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:25,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093687737] [2024-06-20 16:06:25,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093687737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:25,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:25,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:06:25,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751202174] [2024-06-20 16:06:25,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:25,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:06:25,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:06:25,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:06:25,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:06:25,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 115 transitions, 766 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:25,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:25,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:06:25,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:27,933 INFO L124 PetriNetUnfolderBase]: 11765/16325 cut-off events. [2024-06-20 16:06:27,933 INFO L125 PetriNetUnfolderBase]: For 165108/165117 co-relation queries the response was YES. [2024-06-20 16:06:27,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79641 conditions, 16325 events. 11765/16325 cut-off events. For 165108/165117 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88613 event pairs, 5635 based on Foata normal form. 12/16331 useless extension candidates. Maximal degree in co-relation 79610. Up to 15577 conditions per place. [2024-06-20 16:06:28,048 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 106 selfloop transitions, 72 changer transitions 0/184 dead transitions. [2024-06-20 16:06:28,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 184 transitions, 1524 flow [2024-06-20 16:06:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-20 16:06:28,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48504273504273504 [2024-06-20 16:06:28,050 INFO L175 Difference]: Start difference. First operand has 89 places, 115 transitions, 766 flow. Second operand 9 states and 227 transitions. [2024-06-20 16:06:28,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 184 transitions, 1524 flow [2024-06-20 16:06:28,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 184 transitions, 1456 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-20 16:06:28,087 INFO L231 Difference]: Finished difference. Result has 97 places, 136 transitions, 1100 flow [2024-06-20 16:06:28,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1100, PETRI_PLACES=97, PETRI_TRANSITIONS=136} [2024-06-20 16:06:28,088 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-20 16:06:28,088 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 136 transitions, 1100 flow [2024-06-20 16:06:28,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:28,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:28,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:28,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:06:28,089 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:28,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:28,089 INFO L85 PathProgramCache]: Analyzing trace with hash -668331203, now seen corresponding path program 4 times [2024-06-20 16:06:28,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:28,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208871516] [2024-06-20 16:06:28,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:28,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:29,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:29,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208871516] [2024-06-20 16:06:29,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208871516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:29,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:29,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:06:29,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991276101] [2024-06-20 16:06:29,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:29,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:06:29,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:29,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:06:29,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:06:29,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:06:29,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 136 transitions, 1100 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:29,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:29,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:06:29,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:31,092 INFO L124 PetriNetUnfolderBase]: 11756/16313 cut-off events. [2024-06-20 16:06:31,092 INFO L125 PetriNetUnfolderBase]: For 192004/192013 co-relation queries the response was YES. [2024-06-20 16:06:31,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83850 conditions, 16313 events. 11756/16313 cut-off events. For 192004/192013 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88618 event pairs, 5635 based on Foata normal form. 9/16316 useless extension candidates. Maximal degree in co-relation 83816. Up to 15760 conditions per place. [2024-06-20 16:06:31,199 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 132 selfloop transitions, 39 changer transitions 0/177 dead transitions. [2024-06-20 16:06:31,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 177 transitions, 1604 flow [2024-06-20 16:06:31,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:06:31,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:06:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 16:06:31,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-20 16:06:31,201 INFO L175 Difference]: Start difference. First operand has 97 places, 136 transitions, 1100 flow. Second operand 8 states and 196 transitions. [2024-06-20 16:06:31,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 177 transitions, 1604 flow [2024-06-20 16:06:31,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 177 transitions, 1530 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-20 16:06:31,276 INFO L231 Difference]: Finished difference. Result has 103 places, 139 transitions, 1185 flow [2024-06-20 16:06:31,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1185, PETRI_PLACES=103, PETRI_TRANSITIONS=139} [2024-06-20 16:06:31,277 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-20 16:06:31,277 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 139 transitions, 1185 flow [2024-06-20 16:06:31,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:31,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:31,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:31,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:06:31,278 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:31,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:31,278 INFO L85 PathProgramCache]: Analyzing trace with hash 339170896, now seen corresponding path program 1 times [2024-06-20 16:06:31,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:31,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848948732] [2024-06-20 16:06:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:31,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:32,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:32,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848948732] [2024-06-20 16:06:32,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848948732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:32,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:32,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:06:32,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526355174] [2024-06-20 16:06:32,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:32,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:06:32,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:32,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:06:32,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:06:32,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:06:32,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 139 transitions, 1185 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:32,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:32,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:06:32,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:33,895 INFO L124 PetriNetUnfolderBase]: 11762/16329 cut-off events. [2024-06-20 16:06:33,895 INFO L125 PetriNetUnfolderBase]: For 196979/196979 co-relation queries the response was YES. [2024-06-20 16:06:33,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82888 conditions, 16329 events. 11762/16329 cut-off events. For 196979/196979 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88571 event pairs, 5583 based on Foata normal form. 6/16332 useless extension candidates. Maximal degree in co-relation 82852. Up to 15852 conditions per place. [2024-06-20 16:06:34,015 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 147 selfloop transitions, 22 changer transitions 0/175 dead transitions. [2024-06-20 16:06:34,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 175 transitions, 1767 flow [2024-06-20 16:06:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:06:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:06:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 16:06:34,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-20 16:06:34,017 INFO L175 Difference]: Start difference. First operand has 103 places, 139 transitions, 1185 flow. Second operand 6 states and 147 transitions. [2024-06-20 16:06:34,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 175 transitions, 1767 flow [2024-06-20 16:06:34,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 175 transitions, 1622 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:34,106 INFO L231 Difference]: Finished difference. Result has 104 places, 153 transitions, 1262 flow [2024-06-20 16:06:34,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1262, PETRI_PLACES=104, PETRI_TRANSITIONS=153} [2024-06-20 16:06:34,106 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-20 16:06:34,106 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 153 transitions, 1262 flow [2024-06-20 16:06:34,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:34,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:34,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:34,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:06:34,107 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:34,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:34,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2081428679, now seen corresponding path program 1 times [2024-06-20 16:06:34,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:34,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518039212] [2024-06-20 16:06:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:34,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:35,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:35,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518039212] [2024-06-20 16:06:35,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518039212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:35,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:35,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:06:35,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184104163] [2024-06-20 16:06:35,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:35,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:06:35,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:35,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:06:35,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:06:35,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:06:35,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 153 transitions, 1262 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:35,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:35,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:06:35,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:37,310 INFO L124 PetriNetUnfolderBase]: 12111/16873 cut-off events. [2024-06-20 16:06:37,310 INFO L125 PetriNetUnfolderBase]: For 254935/255073 co-relation queries the response was YES. [2024-06-20 16:06:37,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92526 conditions, 16873 events. 12111/16873 cut-off events. For 254935/255073 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 94395 event pairs, 4569 based on Foata normal form. 6/16792 useless extension candidates. Maximal degree in co-relation 92489. Up to 16181 conditions per place. [2024-06-20 16:06:37,457 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 168 selfloop transitions, 20 changer transitions 0/202 dead transitions. [2024-06-20 16:06:37,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 202 transitions, 1824 flow [2024-06-20 16:06:37,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:06:37,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:06:37,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 16:06:37,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-20 16:06:37,459 INFO L175 Difference]: Start difference. First operand has 104 places, 153 transitions, 1262 flow. Second operand 8 states and 205 transitions. [2024-06-20 16:06:37,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 202 transitions, 1824 flow [2024-06-20 16:06:37,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 202 transitions, 1778 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-20 16:06:37,566 INFO L231 Difference]: Finished difference. Result has 111 places, 156 transitions, 1340 flow [2024-06-20 16:06:37,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1340, PETRI_PLACES=111, PETRI_TRANSITIONS=156} [2024-06-20 16:06:37,566 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-20 16:06:37,567 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 156 transitions, 1340 flow [2024-06-20 16:06:37,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:37,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:37,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:37,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:06:37,569 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:37,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:37,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1850604893, now seen corresponding path program 2 times [2024-06-20 16:06:37,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:37,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282899996] [2024-06-20 16:06:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:37,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:38,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:38,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282899996] [2024-06-20 16:06:38,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282899996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:38,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:38,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:06:38,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079144790] [2024-06-20 16:06:38,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:38,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:06:38,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:06:38,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:06:38,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:06:38,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 156 transitions, 1340 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:38,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:38,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:06:38,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:41,033 INFO L124 PetriNetUnfolderBase]: 11934/16724 cut-off events. [2024-06-20 16:06:41,033 INFO L125 PetriNetUnfolderBase]: For 283961/284099 co-relation queries the response was YES. [2024-06-20 16:06:41,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95162 conditions, 16724 events. 11934/16724 cut-off events. For 283961/284099 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 94027 event pairs, 5088 based on Foata normal form. 6/16679 useless extension candidates. Maximal degree in co-relation 95122. Up to 15969 conditions per place. [2024-06-20 16:06:41,149 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 169 selfloop transitions, 21 changer transitions 0/204 dead transitions. [2024-06-20 16:06:41,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 204 transitions, 1910 flow [2024-06-20 16:06:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:06:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:06:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 16:06:41,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-20 16:06:41,151 INFO L175 Difference]: Start difference. First operand has 111 places, 156 transitions, 1340 flow. Second operand 8 states and 205 transitions. [2024-06-20 16:06:41,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 204 transitions, 1910 flow [2024-06-20 16:06:41,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 204 transitions, 1812 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 16:06:41,281 INFO L231 Difference]: Finished difference. Result has 113 places, 159 transitions, 1374 flow [2024-06-20 16:06:41,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1374, PETRI_PLACES=113, PETRI_TRANSITIONS=159} [2024-06-20 16:06:41,287 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-20 16:06:41,287 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 159 transitions, 1374 flow [2024-06-20 16:06:41,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:41,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:41,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:41,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:06:41,288 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:41,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:41,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1850609853, now seen corresponding path program 1 times [2024-06-20 16:06:41,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:41,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061331088] [2024-06-20 16:06:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:41,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:42,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:42,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061331088] [2024-06-20 16:06:42,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061331088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:42,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:42,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:42,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514084562] [2024-06-20 16:06:42,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:42,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:42,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:42,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:42,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:42,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:06:42,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 159 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:42,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:42,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:06:42,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:44,910 INFO L124 PetriNetUnfolderBase]: 12430/17247 cut-off events. [2024-06-20 16:06:44,911 INFO L125 PetriNetUnfolderBase]: For 320263/320401 co-relation queries the response was YES. [2024-06-20 16:06:44,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98643 conditions, 17247 events. 12430/17247 cut-off events. For 320263/320401 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 94353 event pairs, 5152 based on Foata normal form. 3/17178 useless extension candidates. Maximal degree in co-relation 98602. Up to 16632 conditions per place. [2024-06-20 16:06:45,046 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 183 selfloop transitions, 26 changer transitions 0/218 dead transitions. [2024-06-20 16:06:45,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 218 transitions, 2035 flow [2024-06-20 16:06:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:45,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-20 16:06:45,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-20 16:06:45,048 INFO L175 Difference]: Start difference. First operand has 113 places, 159 transitions, 1374 flow. Second operand 9 states and 221 transitions. [2024-06-20 16:06:45,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 218 transitions, 2035 flow [2024-06-20 16:06:45,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 218 transitions, 1924 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:06:45,174 INFO L231 Difference]: Finished difference. Result has 117 places, 167 transitions, 1452 flow [2024-06-20 16:06:45,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1452, PETRI_PLACES=117, PETRI_TRANSITIONS=167} [2024-06-20 16:06:45,175 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 62 predicate places. [2024-06-20 16:06:45,175 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 167 transitions, 1452 flow [2024-06-20 16:06:45,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:45,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:45,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:45,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:06:45,176 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:45,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:45,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1127002567, now seen corresponding path program 3 times [2024-06-20 16:06:45,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:45,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59866089] [2024-06-20 16:06:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:45,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:46,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:46,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59866089] [2024-06-20 16:06:46,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59866089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:46,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:46,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:06:46,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7006961] [2024-06-20 16:06:46,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:46,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:06:46,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:46,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:06:46,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:06:46,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:06:46,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 167 transitions, 1452 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:46,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:46,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:06:46,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:48,385 INFO L124 PetriNetUnfolderBase]: 11963/16812 cut-off events. [2024-06-20 16:06:48,385 INFO L125 PetriNetUnfolderBase]: For 362710/362848 co-relation queries the response was YES. [2024-06-20 16:06:48,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102221 conditions, 16812 events. 11963/16812 cut-off events. For 362710/362848 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 94777 event pairs, 4861 based on Foata normal form. 12/16752 useless extension candidates. Maximal degree in co-relation 102178. Up to 16020 conditions per place. [2024-06-20 16:06:48,537 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 170 selfloop transitions, 27 changer transitions 0/212 dead transitions. [2024-06-20 16:06:48,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 212 transitions, 2038 flow [2024-06-20 16:06:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:06:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:06:48,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 16:06:48,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-20 16:06:48,556 INFO L175 Difference]: Start difference. First operand has 117 places, 167 transitions, 1452 flow. Second operand 8 states and 202 transitions. [2024-06-20 16:06:48,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 212 transitions, 2038 flow [2024-06-20 16:06:48,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 212 transitions, 1911 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 16:06:48,698 INFO L231 Difference]: Finished difference. Result has 119 places, 170 transitions, 1480 flow [2024-06-20 16:06:48,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1480, PETRI_PLACES=119, PETRI_TRANSITIONS=170} [2024-06-20 16:06:48,699 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-20 16:06:48,699 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 170 transitions, 1480 flow [2024-06-20 16:06:48,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:48,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:48,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:48,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:06:48,700 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:48,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:48,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1963096099, now seen corresponding path program 2 times [2024-06-20 16:06:48,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:48,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189941432] [2024-06-20 16:06:48,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:48,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:50,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:50,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189941432] [2024-06-20 16:06:50,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189941432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:50,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:50,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:50,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996395140] [2024-06-20 16:06:50,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:50,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:50,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:50,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:50,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:50,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:06:50,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 170 transitions, 1480 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:50,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:50,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:06:50,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:52,696 INFO L124 PetriNetUnfolderBase]: 12555/17423 cut-off events. [2024-06-20 16:06:52,696 INFO L125 PetriNetUnfolderBase]: For 402271/402409 co-relation queries the response was YES. [2024-06-20 16:06:52,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107054 conditions, 17423 events. 12555/17423 cut-off events. For 402271/402409 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 95144 event pairs, 5160 based on Foata normal form. 3/17354 useless extension candidates. Maximal degree in co-relation 107010. Up to 16692 conditions per place. [2024-06-20 16:06:52,859 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 170 selfloop transitions, 51 changer transitions 0/230 dead transitions. [2024-06-20 16:06:52,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 230 transitions, 2351 flow [2024-06-20 16:06:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-20 16:06:52,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 16:06:52,862 INFO L175 Difference]: Start difference. First operand has 119 places, 170 transitions, 1480 flow. Second operand 9 states and 225 transitions. [2024-06-20 16:06:52,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 230 transitions, 2351 flow [2024-06-20 16:06:53,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 230 transitions, 2188 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-20 16:06:53,039 INFO L231 Difference]: Finished difference. Result has 122 places, 179 transitions, 1665 flow [2024-06-20 16:06:53,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1665, PETRI_PLACES=122, PETRI_TRANSITIONS=179} [2024-06-20 16:06:53,040 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-06-20 16:06:53,040 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 179 transitions, 1665 flow [2024-06-20 16:06:53,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:53,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:53,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:53,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:06:53,041 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:53,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:53,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1963275589, now seen corresponding path program 3 times [2024-06-20 16:06:53,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:53,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775125139] [2024-06-20 16:06:53,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:53,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:54,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:54,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775125139] [2024-06-20 16:06:54,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775125139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:54,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:54,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:54,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102056437] [2024-06-20 16:06:54,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:54,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:54,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:54,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:54,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:54,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:06:54,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 179 transitions, 1665 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:54,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:54,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:06:54,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:57,148 INFO L124 PetriNetUnfolderBase]: 12599/17491 cut-off events. [2024-06-20 16:06:57,148 INFO L125 PetriNetUnfolderBase]: For 443019/443157 co-relation queries the response was YES. [2024-06-20 16:06:57,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110923 conditions, 17491 events. 12599/17491 cut-off events. For 443019/443157 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 95665 event pairs, 5160 based on Foata normal form. 3/17422 useless extension candidates. Maximal degree in co-relation 110878. Up to 16844 conditions per place. [2024-06-20 16:06:57,503 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 193 selfloop transitions, 33 changer transitions 0/235 dead transitions. [2024-06-20 16:06:57,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 235 transitions, 2370 flow [2024-06-20 16:06:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-20 16:06:57,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700854700854701 [2024-06-20 16:06:57,505 INFO L175 Difference]: Start difference. First operand has 122 places, 179 transitions, 1665 flow. Second operand 9 states and 220 transitions. [2024-06-20 16:06:57,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 235 transitions, 2370 flow [2024-06-20 16:06:57,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 235 transitions, 2216 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:57,663 INFO L231 Difference]: Finished difference. Result has 127 places, 187 transitions, 1725 flow [2024-06-20 16:06:57,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1725, PETRI_PLACES=127, PETRI_TRANSITIONS=187} [2024-06-20 16:06:57,664 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-20 16:06:57,664 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 187 transitions, 1725 flow [2024-06-20 16:06:57,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:57,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:57,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:57,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:06:57,665 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:06:57,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:57,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1963095851, now seen corresponding path program 1 times [2024-06-20 16:06:57,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:57,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753052065] [2024-06-20 16:06:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:57,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:58,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:58,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753052065] [2024-06-20 16:06:58,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753052065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:58,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:58,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:58,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770529652] [2024-06-20 16:06:58,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:58,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:58,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:58,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:58,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:59,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:06:59,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 187 transitions, 1725 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:59,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:59,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:06:59,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:01,741 INFO L124 PetriNetUnfolderBase]: 12716/17624 cut-off events. [2024-06-20 16:07:01,741 INFO L125 PetriNetUnfolderBase]: For 471091/471229 co-relation queries the response was YES. [2024-06-20 16:07:01,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112810 conditions, 17624 events. 12716/17624 cut-off events. For 471091/471229 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 96069 event pairs, 5139 based on Foata normal form. 6/17543 useless extension candidates. Maximal degree in co-relation 112764. Up to 17020 conditions per place. [2024-06-20 16:07:01,888 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 205 selfloop transitions, 25 changer transitions 0/239 dead transitions. [2024-06-20 16:07:01,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 239 transitions, 2393 flow [2024-06-20 16:07:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-20 16:07:01,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658119658119658 [2024-06-20 16:07:01,890 INFO L175 Difference]: Start difference. First operand has 127 places, 187 transitions, 1725 flow. Second operand 9 states and 218 transitions. [2024-06-20 16:07:01,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 239 transitions, 2393 flow [2024-06-20 16:07:02,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 239 transitions, 2266 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:07:02,122 INFO L231 Difference]: Finished difference. Result has 130 places, 190 transitions, 1746 flow [2024-06-20 16:07:02,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1598, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1746, PETRI_PLACES=130, PETRI_TRANSITIONS=190} [2024-06-20 16:07:02,123 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-20 16:07:02,123 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 190 transitions, 1746 flow [2024-06-20 16:07:02,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:02,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:02,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:02,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:07:02,124 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:07:02,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:02,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1963102609, now seen corresponding path program 4 times [2024-06-20 16:07:02,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:02,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041748520] [2024-06-20 16:07:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:02,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:03,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:03,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041748520] [2024-06-20 16:07:03,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041748520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:03,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:03,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:03,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923638981] [2024-06-20 16:07:03,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:03,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:03,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:03,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:07:03,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 190 transitions, 1746 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:03,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:03,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:07:03,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:06,338 INFO L124 PetriNetUnfolderBase]: 12701/17606 cut-off events. [2024-06-20 16:07:06,339 INFO L125 PetriNetUnfolderBase]: For 508263/508401 co-relation queries the response was YES. [2024-06-20 16:07:06,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115554 conditions, 17606 events. 12701/17606 cut-off events. For 508263/508401 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 96002 event pairs, 5146 based on Foata normal form. 3/17523 useless extension candidates. Maximal degree in co-relation 115507. Up to 16985 conditions per place. [2024-06-20 16:07:06,483 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 196 selfloop transitions, 33 changer transitions 0/238 dead transitions. [2024-06-20 16:07:06,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 238 transitions, 2328 flow [2024-06-20 16:07:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-20 16:07:06,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700854700854701 [2024-06-20 16:07:06,485 INFO L175 Difference]: Start difference. First operand has 130 places, 190 transitions, 1746 flow. Second operand 9 states and 220 transitions. [2024-06-20 16:07:06,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 238 transitions, 2328 flow [2024-06-20 16:07:06,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 238 transitions, 2146 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:06,822 INFO L231 Difference]: Finished difference. Result has 132 places, 190 transitions, 1641 flow [2024-06-20 16:07:06,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1641, PETRI_PLACES=132, PETRI_TRANSITIONS=190} [2024-06-20 16:07:06,823 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-20 16:07:06,823 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 190 transitions, 1641 flow [2024-06-20 16:07:06,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:06,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:06,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:06,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:07:06,824 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:07:06,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:06,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1912922569, now seen corresponding path program 1 times [2024-06-20 16:07:06,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:06,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827339828] [2024-06-20 16:07:06,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:06,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:07,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:07,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827339828] [2024-06-20 16:07:07,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827339828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:07,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:07,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:07:07,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032304271] [2024-06-20 16:07:07,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:07,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:07:07,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:07,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:07:07,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:07:07,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:07:07,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 190 transitions, 1641 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:07,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:07,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:07:07,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:10,079 INFO L124 PetriNetUnfolderBase]: 12739/17661 cut-off events. [2024-06-20 16:07:10,080 INFO L125 PetriNetUnfolderBase]: For 535774/535934 co-relation queries the response was YES. [2024-06-20 16:07:10,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116801 conditions, 17661 events. 12739/17661 cut-off events. For 535774/535934 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 96337 event pairs, 5116 based on Foata normal form. 8/17578 useless extension candidates. Maximal degree in co-relation 116753. Up to 17048 conditions per place. [2024-06-20 16:07:10,266 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 193 selfloop transitions, 24 changer transitions 0/226 dead transitions. [2024-06-20 16:07:10,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 226 transitions, 2397 flow [2024-06-20 16:07:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:07:10,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:07:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 16:07:10,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-20 16:07:10,267 INFO L175 Difference]: Start difference. First operand has 132 places, 190 transitions, 1641 flow. Second operand 6 states and 151 transitions. [2024-06-20 16:07:10,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 226 transitions, 2397 flow [2024-06-20 16:07:10,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 226 transitions, 2284 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 16:07:10,785 INFO L231 Difference]: Finished difference. Result has 130 places, 198 transitions, 1746 flow [2024-06-20 16:07:10,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1746, PETRI_PLACES=130, PETRI_TRANSITIONS=198} [2024-06-20 16:07:10,786 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-20 16:07:10,786 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 198 transitions, 1746 flow [2024-06-20 16:07:10,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:10,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:10,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:10,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:07:10,787 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:07:10,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:10,788 INFO L85 PathProgramCache]: Analyzing trace with hash 756385627, now seen corresponding path program 4 times [2024-06-20 16:07:10,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:10,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222190975] [2024-06-20 16:07:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:10,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:11,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:11,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222190975] [2024-06-20 16:07:11,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222190975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:11,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:11,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:07:11,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975072692] [2024-06-20 16:07:11,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:11,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:07:11,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:11,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:07:11,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:07:12,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:07:12,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 198 transitions, 1746 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:12,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:12,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:07:12,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:14,385 INFO L124 PetriNetUnfolderBase]: 12135/17035 cut-off events. [2024-06-20 16:07:14,385 INFO L125 PetriNetUnfolderBase]: For 573358/573521 co-relation queries the response was YES. [2024-06-20 16:07:14,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118699 conditions, 17035 events. 12135/17035 cut-off events. For 573358/573521 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 95678 event pairs, 4898 based on Foata normal form. 18/16966 useless extension candidates. Maximal degree in co-relation 118650. Up to 16143 conditions per place. [2024-06-20 16:07:14,557 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 167 selfloop transitions, 57 changer transitions 0/240 dead transitions. [2024-06-20 16:07:14,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 240 transitions, 2394 flow [2024-06-20 16:07:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:07:14,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:07:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 16:07:14,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-20 16:07:14,559 INFO L175 Difference]: Start difference. First operand has 130 places, 198 transitions, 1746 flow. Second operand 8 states and 202 transitions. [2024-06-20 16:07:14,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 240 transitions, 2394 flow [2024-06-20 16:07:14,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 240 transitions, 2318 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-20 16:07:14,967 INFO L231 Difference]: Finished difference. Result has 136 places, 201 transitions, 1902 flow [2024-06-20 16:07:14,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1902, PETRI_PLACES=136, PETRI_TRANSITIONS=201} [2024-06-20 16:07:14,967 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2024-06-20 16:07:14,967 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 201 transitions, 1902 flow [2024-06-20 16:07:14,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:14,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:14,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:14,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:07:14,968 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:07:14,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:14,969 INFO L85 PathProgramCache]: Analyzing trace with hash 756390587, now seen corresponding path program 5 times [2024-06-20 16:07:14,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:14,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821376843] [2024-06-20 16:07:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:14,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:16,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:16,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821376843] [2024-06-20 16:07:16,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821376843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:16,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:16,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:16,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894054310] [2024-06-20 16:07:16,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:16,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:16,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:16,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:16,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:16,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:07:16,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 201 transitions, 1902 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:16,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:16,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:07:16,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:19,314 INFO L124 PetriNetUnfolderBase]: 12753/17689 cut-off events. [2024-06-20 16:07:19,315 INFO L125 PetriNetUnfolderBase]: For 623733/623896 co-relation queries the response was YES. [2024-06-20 16:07:19,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123430 conditions, 17689 events. 12753/17689 cut-off events. For 623733/623896 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 96578 event pairs, 5116 based on Foata normal form. 9/17605 useless extension candidates. Maximal degree in co-relation 123379. Up to 16918 conditions per place. [2024-06-20 16:07:19,487 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 182 selfloop transitions, 63 changer transitions 0/254 dead transitions. [2024-06-20 16:07:19,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 254 transitions, 2637 flow [2024-06-20 16:07:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:19,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-20 16:07:19,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-20 16:07:19,489 INFO L175 Difference]: Start difference. First operand has 136 places, 201 transitions, 1902 flow. Second operand 9 states and 221 transitions. [2024-06-20 16:07:19,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 254 transitions, 2637 flow [2024-06-20 16:07:19,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 254 transitions, 2399 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-20 16:07:19,939 INFO L231 Difference]: Finished difference. Result has 139 places, 209 transitions, 1938 flow [2024-06-20 16:07:19,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1938, PETRI_PLACES=139, PETRI_TRANSITIONS=209} [2024-06-20 16:07:19,940 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-20 16:07:19,940 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 209 transitions, 1938 flow [2024-06-20 16:07:19,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:19,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:19,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:19,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:07:19,940 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:07:19,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2131713137, now seen corresponding path program 6 times [2024-06-20 16:07:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:19,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55528596] [2024-06-20 16:07:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:21,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:21,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:21,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55528596] [2024-06-20 16:07:21,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55528596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:21,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:21,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:21,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506730160] [2024-06-20 16:07:21,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:21,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:21,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:21,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:21,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:21,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:07:21,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 209 transitions, 1938 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:21,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:21,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:07:21,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:24,554 INFO L124 PetriNetUnfolderBase]: 12744/17677 cut-off events. [2024-06-20 16:07:24,554 INFO L125 PetriNetUnfolderBase]: For 646428/646591 co-relation queries the response was YES. [2024-06-20 16:07:24,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123868 conditions, 17677 events. 12744/17677 cut-off events. For 646428/646591 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 96512 event pairs, 5116 based on Foata normal form. 9/17593 useless extension candidates. Maximal degree in co-relation 123816. Up to 16906 conditions per place. [2024-06-20 16:07:24,720 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 183 selfloop transitions, 62 changer transitions 0/254 dead transitions. [2024-06-20 16:07:24,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 254 transitions, 2544 flow [2024-06-20 16:07:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-20 16:07:24,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-20 16:07:24,722 INFO L175 Difference]: Start difference. First operand has 139 places, 209 transitions, 1938 flow. Second operand 9 states and 222 transitions. [2024-06-20 16:07:24,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 254 transitions, 2544 flow [2024-06-20 16:07:25,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 254 transitions, 2273 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-06-20 16:07:25,146 INFO L231 Difference]: Finished difference. Result has 140 places, 209 transitions, 1802 flow [2024-06-20 16:07:25,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1802, PETRI_PLACES=140, PETRI_TRANSITIONS=209} [2024-06-20 16:07:25,147 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-20 16:07:25,147 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 209 transitions, 1802 flow [2024-06-20 16:07:25,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:25,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:25,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:25,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:07:25,148 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:07:25,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:25,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2131719895, now seen corresponding path program 2 times [2024-06-20 16:07:25,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:25,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635321418] [2024-06-20 16:07:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:25,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:26,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:26,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635321418] [2024-06-20 16:07:26,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635321418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:26,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:26,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:26,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695229271] [2024-06-20 16:07:26,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:26,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:26,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:26,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:26,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:26,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:07:26,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 209 transitions, 1802 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:26,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:26,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:07:26,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:29,149 INFO L124 PetriNetUnfolderBase]: 12944/17973 cut-off events. [2024-06-20 16:07:29,149 INFO L125 PetriNetUnfolderBase]: For 697734/697897 co-relation queries the response was YES. [2024-06-20 16:07:29,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127099 conditions, 17973 events. 12944/17973 cut-off events. For 697734/697897 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 98448 event pairs, 5140 based on Foata normal form. 36/17916 useless extension candidates. Maximal degree in co-relation 127048. Up to 16920 conditions per place. [2024-06-20 16:07:29,344 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 181 selfloop transitions, 74 changer transitions 0/264 dead transitions. [2024-06-20 16:07:29,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 264 transitions, 2570 flow [2024-06-20 16:07:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-20 16:07:29,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48504273504273504 [2024-06-20 16:07:29,346 INFO L175 Difference]: Start difference. First operand has 140 places, 209 transitions, 1802 flow. Second operand 9 states and 227 transitions. [2024-06-20 16:07:29,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 264 transitions, 2570 flow [2024-06-20 16:07:29,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 264 transitions, 2352 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-20 16:07:29,693 INFO L231 Difference]: Finished difference. Result has 141 places, 214 transitions, 1862 flow [2024-06-20 16:07:29,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1862, PETRI_PLACES=141, PETRI_TRANSITIONS=214} [2024-06-20 16:07:29,694 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-20 16:07:29,694 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 214 transitions, 1862 flow [2024-06-20 16:07:29,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:29,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:29,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:29,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:07:29,695 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:07:29,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:29,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2131719647, now seen corresponding path program 7 times [2024-06-20 16:07:29,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:29,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433202459] [2024-06-20 16:07:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:29,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:31,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:31,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433202459] [2024-06-20 16:07:31,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433202459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:31,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:31,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140962244] [2024-06-20 16:07:31,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:31,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:31,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:31,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:31,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:31,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:07:31,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 214 transitions, 1862 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:31,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:31,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:07:31,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:34,263 INFO L124 PetriNetUnfolderBase]: 12966/18006 cut-off events. [2024-06-20 16:07:34,263 INFO L125 PetriNetUnfolderBase]: For 741679/741833 co-relation queries the response was YES. [2024-06-20 16:07:34,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130523 conditions, 18006 events. 12966/18006 cut-off events. For 741679/741833 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 98604 event pairs, 5150 based on Foata normal form. 3/17912 useless extension candidates. Maximal degree in co-relation 130472. Up to 17136 conditions per place. [2024-06-20 16:07:34,426 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 171 selfloop transitions, 83 changer transitions 0/263 dead transitions. [2024-06-20 16:07:34,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 263 transitions, 2610 flow [2024-06-20 16:07:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:34,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-20 16:07:34,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47863247863247865 [2024-06-20 16:07:34,428 INFO L175 Difference]: Start difference. First operand has 141 places, 214 transitions, 1862 flow. Second operand 9 states and 224 transitions. [2024-06-20 16:07:34,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 263 transitions, 2610 flow [2024-06-20 16:07:34,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 263 transitions, 2434 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:34,812 INFO L231 Difference]: Finished difference. Result has 143 places, 218 transitions, 1995 flow [2024-06-20 16:07:34,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1995, PETRI_PLACES=143, PETRI_TRANSITIONS=218} [2024-06-20 16:07:34,813 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2024-06-20 16:07:34,813 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 218 transitions, 1995 flow [2024-06-20 16:07:34,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:34,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:34,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:34,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:07:34,814 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:07:34,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:34,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2137975757, now seen corresponding path program 8 times [2024-06-20 16:07:34,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:34,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113975899] [2024-06-20 16:07:34,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:34,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:36,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:36,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113975899] [2024-06-20 16:07:36,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113975899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:36,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:36,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:36,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386954719] [2024-06-20 16:07:36,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:36,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:36,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:36,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:07:36,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 218 transitions, 1995 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:36,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:36,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:07:36,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand